Vibration transmission sheet and bone conduction vibrator

Abstract

The utility model discloses a kind of transmission vibration sheet and bone conduction vibrator, be circular or runway circle structure, transmission vibration sheet includes vibration part and annular fixed part, annular fixed part is around and interval setting in the outer periphery of vibration part, vibration part is connected between annular fixed part by several connecting arms, the number of connecting arm is even, and the outside connecting end of connecting arm is fixedly connected with annular fixed part, the inside connecting end of connecting arm is fixedly connected with vibration part;At least two adjacent connecting arms outside connecting end is close to each other and is connected on the inner ring wall of annular fixed part, and / or, the inside connecting end of adjacent two connecting arms is close to each other and is connected on the edge of vibration part.The utility model has the following advantages and effects: the present scheme utilizes new mechanical structure, has the effect that energy can be efficiently transmitted, effectively inhibits sound leakage.

Description

Technical Field

[0001] This utility model relates to the field of bone conduction headphone technology, and in particular to a vibration plate and a bone conduction vibrator. Background Technology

[0002] Bone conduction headphones convert electrical signals into mechanical vibrations of a specific frequency through a built-in transducer, transmitting the sound directly to the auditory nerve in the inner ear via the skull, bypassing the outer ear and eardrum. Unlike traditional in-ear headphones, bone conduction headphones do not rely on air conduction; instead, they transmit sound directly through bone vibrations. This avoids the involvement of the outer ear and eardrum, thus reducing the risk of ear canal compression and eardrum damage, and protecting hearing. The transducer, as a crucial vibrating element in the bone conduction transducer, directly affects the sound quality. Currently, transducers on the market typically use circular or square structures. Circular transducers offer more uniform vibration distribution, but with the same contact area, their higher rigidity results in less ideal energy transfer and generally poorer low-frequency vibration. Square transducers have a larger contact area, but their vibration distribution is less uniform, and they are less comfortable to wear and more difficult to control sound leakage. Therefore, there is an urgent need to develop a transducer with superior overall performance. Utility Model Content

[0003] The purpose of this invention is to provide a vibration transducer and a bone conduction transducer that can efficiently transmit energy and effectively suppress sound leakage.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a vibration transducer, which is circular or racetrack-shaped, includes a vibration part and an annular fixing part. The annular fixing part is arranged around and spaced apart on the outer periphery of the vibration part. The vibration part and the annular fixing part are connected by a plurality of connecting arms. The number of connecting arms is even, and the outer connecting end of the connecting arm is fixedly connected to the annular fixing part, and the inner connecting end of the connecting arm is fixedly connected to the vibration part. The outer connecting ends of at least two adjacent connecting arms are close to each other and connected to the inner ring wall of the annular fixing part, and / or the inner connecting ends of two adjacent connecting arms are close to each other and connected to the edge of the vibrating part.

[0005] By adopting the above technical solution, the adjacent connecting arms of this utility model adopt a structure design with their ends close together, which strictly restricts the movement of the vibrating part and directs it towards the direction of the skull, effectively suppressing the lateral swaying or irregular torsional vibration of the vibrating part. This greatly reduces energy dissipation between the fixed part and the connecting arm, while the more stable axial movement of the vibrating part is also conducive to achieving a more stable frequency response. The separate design of the vibrating part and the fixed part is elastically connected by the connecting arm, which can reduce the situation where vibration is directly transmitted to the earphone shell and causes resonance and sound leakage, thereby effectively improving the sound leakage prevention performance of this utility model. In addition, the connecting arms of this utility model adopt an even number design, which allows the stress acting on the vibrating part to be more evenly distributed to each connecting arm, thereby improving the structural reliability and service life of this utility model, and achieving the effect of efficient energy transmission and effective suppression of sound leakage.

[0006] A further feature of this invention is that the vibration transducer is a circular structure that is both centrally symmetrical and axially symmetrical, with the outer connecting ends of at least two adjacent connecting arms close to each other and connected to the inner ring wall of the annular fixing part, and the inner connecting ends of at least two adjacent connecting arms close to each other and connected to the edge of the vibration part.

[0007] By adopting the above technical solution, the even-numbered symmetrical connecting arm design avoids local stress concentration and reduces the risk of fatigue fracture of the connecting arms under high-intensity, long-term operation.

[0008] A further feature of this invention is that the vibration plate is designed as a runway-shaped circular structure, the edge of the vibration part includes symmetrically distributed inner straight segments and inner semi-circular arc segments, the edge of the annular fixing part includes symmetrically distributed outer straight segments and outer arc segments, the outer connecting end of the connecting arm is connected to the corresponding outer straight segment or outer arc segment, and the inner connecting end of the connecting arm is connected to the inner straight segment or inner semi-circular arc segment.

[0009] By adopting the above technical solution, the symmetrically arranged inner and outer straight segments, combined with the symmetrically distributed inner and outer arc segments, enable the vibrating plate to form an orthogonal modal structure, improve space utilization, and thus achieve effective control of broadband vibration.

[0010] A further feature of this invention is that the outer connecting end of the connecting arm is connected to a point near the center of the outer arc segment, and the inner connecting end of the connecting arm is connected to a point near the center of the inner straight segment.

[0011] By adopting the above technical solution, the connection points at both ends of the connecting arm are set close to the center points of the outer arc segment and the inner straight segment on the corresponding side, which is conducive to forming a phase synchronization zone and reducing vibration delay.

[0012] A further feature of this invention is that the outer connecting end of the connecting arm is connected to a point near the center of the outer straight segment, and the inner connecting end of the connecting arm is connected to a point near the center of the inner arc segment.

[0013] A further feature of this invention is that the connection points on both sides of the connection point between the outer connecting end of the connecting arm and the annular fixing part, and the connection points on both sides of the connection point between the inner connecting end and the vibration part are all provided with arc transition structures.

[0014] By adopting the above technical solution, the arc transition structure can reduce the local resonance defects that are prone to occur at sharp angles and prevent sound coloration caused by energy accumulation in specific frequency bands.

[0015] A further feature of this invention is that the vibration transducer is designed as a racetrack-shaped structure, and the ratio of the length of the connecting arm to the circumference of the vibration transducer is controlled between 0.1 and 0.5.

[0016] By adopting the above technical solutions, the acoustic performance of the vibrating pad can be improved, the bandwidth can be extended to the full frequency range of the human ear, the fatigue limit can be increased, and thus the service life can be extended.

[0017] A further feature of this invention is that the width of the connecting arm gradually increases from the middle towards the outer connecting end and the inner connecting end, and the width of the connecting arm is set between 0.1-0.8 mm.

[0018] By adopting the above technical solution, the width of the area of ​​the connecting arm near the outer connecting end and the inner connecting end can be widened, which can effectively increase the contact area between the outer connecting end, the inner connecting end and the corresponding annular fixing part and vibration part, improve the rigid support force of the connecting arm end, significantly reduce the local stress concentration, and avoid material fatigue fracture under long-term vibration. The narrower area in the middle can provide flexible elastic force and reduce driving energy consumption.

[0019] A further feature of this invention is that the thickness of the vibration transducer is controlled between 0.1 and 0.3 mm.

[0020] By adopting the above technical solution, a thinner transducer thickness can provide a faster response speed, thereby improving the start-up speed of the transducer's transient response.

[0021] Another technical objective of this invention is to provide a bone conduction oscillator, including the aforementioned vibration transducer.

[0022] In summary, this utility model has the following beneficial effects: The vibration transducer is designed as a circular or racetrack-shaped structure, comprising a vibrating part and an annular fixing part. The annular fixing part surrounds and is spaced apart around the outer periphery of the vibrating part. The vibrating part and the annular fixing part are connected by several connecting arms, the number of which is even. The outer connecting end of each connecting arm is fixedly connected to the annular fixing part, and the inner connecting end of each connecting arm is fixedly connected to the vibrating part. The adjacent connecting arms of this invention feature a close-to-the-ends design, which strictly limits the movement of the vibrating part and directs it towards the skull, effectively suppressing lateral swaying or irregular torsional vibrations, thereby significantly reducing vibration. The design minimizes energy dissipation between the fixed part and the connecting arm, while the more stable axial movement of the vibrating part facilitates a more stable frequency response. The separate design of the vibrating part and the fixed part is elastically connected by the connecting arm, which reduces the direct transmission of vibration to the earphone shell, thus reducing resonance and sound leakage. This effectively improves the sound leakage prevention performance of this invention. In addition, the even-number design of the connecting arms allows the stress acting on the vibrating part to be more evenly distributed to each connecting arm, thereby improving the structural reliability and service life of this invention. It has the effect of efficient energy transfer and effective suppression of sound leakage. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the vibration plate structure in a specific embodiment of this utility model.

[0024] Figure 2 This is a schematic diagram of the vibration plate structure in a specific embodiment two of this utility model.

[0025] Figure 3 This is a schematic diagram of the vibration plate structure in a specific embodiment three of this utility model.

[0026] Figure 4 This is a schematic diagram of the vibration plate structure in a specific embodiment four of this utility model.

[0027] In the diagram: 1. Vibration transducer; 2. Vibrating part; 3. Annular fixing part; 4. Connecting arm; 41. Outer connecting end; 42. Inner connecting end; 51. Inner straight line segment; 52. Outer straight line segment; 61. Inner semi-circular arc segment; 62. Outer circular arc segment; 7. First tuning space; 8. Second tuning space; 9. Circular arc transition structure. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] A type of vibration transducer, such as Figures 1-4As shown, the vibration transducer 1 includes a vibration part 2 and an annular fixing part 3. The annular fixing part 3 is arranged around and spaced apart on the outer periphery of the vibration part 2. The vibration part 2 and the annular fixing part 3 are connected by a plurality of connecting arms 4. The number of connecting arms 4 is even. This utility model has four connecting arms 4. The outer connecting end 41 of the connecting arm 4 is fixedly connected to the annular fixing part 3, and the inner connecting end 42 of the connecting arm 4 is fixedly connected to the vibration part 2. The outer connecting ends 41 of at least two adjacent connecting arms 4 are close to each other and connected to the inner ring wall of the annular fixing part 3, and / or the inner connecting ends 42 of two adjacent connecting arms 4 are close to each other and connected to the edge of the vibration part 2.

[0030] The outer connecting end 41 of the connecting arm 4 and the ring fixing part 3, and the inner connecting end 42 and the vibrating part 2, are both provided with arc transition structures 9. The arc transition structure 9 can reduce the local resonance defects that are easily generated at sharp angles and prevent sound coloration caused by energy accumulation in specific frequency bands. The vibration plate 1 is centrally symmetrical and axially symmetrical in structure. The vibrating part 2, the ring fixing part 3 and the four connecting arms 4 are coplanar in the static state. The vibration plate 1 adopts a double symmetrical structure to force vibration, so that the energy is transmitted vertically, eliminating the eccentric force and reducing the sound distortion. Moreover, the multiple connecting arms 4 evenly distribute the stress and suppress the sound wave radiation generated by non-axial vibration. The width of the connecting arm 4 extends from the middle to the outer connecting end 41 and the inner side. The connecting end 42 gradually increases in size, and the width of the connecting arm 4 is set between 0.1-0.8mm. Widening the area of ​​the connecting arm 4 near the outer connecting end 41 and the inner connecting end 42 can effectively increase the contact area between the outer connecting end 41, the inner connecting end 42 and the corresponding annular fixing part 3 and vibration part 2, improve the rigid support force at the end of the connecting arm 4, significantly reduce local stress, and avoid material fatigue fracture under long-term vibration. The narrower area in the middle can provide flexible elastic force and reduce driving energy consumption. In addition, in this embodiment, the thickness of the vibration plate 1 is controlled between 0.1-0.3mm. The thinner thickness of the vibration plate 1 can provide a faster response speed, thereby improving the start-up speed of the transient response of the vibration plate 1. Specific Implementation Example 1 like Figure 1As shown, the transducer 1 in this embodiment is designed as a centrally symmetrical and axially symmetrical circular structure. The outer connecting ends 41 of at least two adjacent connecting arms 4 are close to each other and connected to the inner ring wall of the annular fixing part 3. The inner connecting ends 42 of at least two adjacent connecting arms 4 are close to each other and connected to the edge of the vibrating part 2. The even-numbered symmetrical design of the connecting arms 4 avoids local stress concentration and reduces the risk of fatigue fracture of the connecting arms 4 under high-intensity and long-term operation. The outer wall of the vibrating part 2 and the adjacent connecting arms 4 form a first tuning space 7. The inner wall of the annular fixing part 3 and the adjacent connecting arms 4 form a first tuning space 7. The second tuning space 8 is formed by setting the first tuning space 7 close to the inner side of the vibrating part 2, which directly affects the sound waves generated in the central area of ​​the vibrating part 2 and is used to adjust the mid-low frequency sound waves of the transducer 1. The second tuning space 8 is distributed close to the outer side of the vibrating part 2, which mainly affects the vibration frequency of the edge of the vibrating part 2. It can suppress specific high frequency resonance peaks, improve the clarity of human voice and the detail of musical instruments, and reduce the harshness. Moreover, the positions of the first tuning space 7 and the second tuning space 8 are separated from each other, avoiding the limitation of a single tuning space that is incomplete, and greatly improving the freedom and accuracy of the transducer 1 when tuning. Specific Implementation Example 2 like Figure 2As shown, the difference between this embodiment and specific embodiment one is that: the vibration plate 1 is designed as a runway circular structure, and the edge of the vibration part 2 includes symmetrically distributed inner straight segments 51 and inner semi-circular arc segments 61. The outer connecting end 41 of the connecting arm 4 is connected to the corresponding outer arc segment 62, and the outer connecting end 41 of the connecting arm 4 is connected to the outer arc segment 62 near the center point. The inner connecting end 42 of the connecting arm 4 is connected to the inner straight segment 51, and the inner connecting end 42 of the connecting arm 4 is connected to the inner straight segment 51 near the center point. The connection points at both ends of the connecting arm 4 are close to the corresponding outer arc segment 62 and inner arc segment 62. The center point of the straight segment 51 is set to facilitate the formation of a phase synchronization zone and reduce vibration delay. Furthermore, the symmetrically arranged inner and outer straight segments 51 and 52, along with the symmetrically distributed inner and outer arc segments 62, enable the vibrator to form an orthogonal modal structure, improving space utilization and thus enabling effective control of broadband vibration. The inner semi-circular arc segment 61, the inner straight segments 51 located at both ends of the inner semi-circular arc segment 61, and the adjacent connecting arm 4 enclose a U-shaped first tuning space 7. The edge of the annular fixing part 3 includes symmetrically distributed outer straight segments 52 and outer arc segments 62. 52. The outer arc segments 62 at both ends of the outer straight segment 52 and the adjacent connecting arm 4 form a second tuning space 8. The semi-circular areas on both sides of the vibrating part 2 can improve the vibration uniformity of the transducer 1, while the square area in the middle of the vibrating part 2 can improve space utilization, making the contact surface of the transducer 1 larger and more in line with the skeleton, thus improving the vibration transmission efficiency of this utility model. The second tuning space 8 faces outward relative to the first tuning space 7, improving the low-frequency response of the transducer 1. In addition, in this embodiment, the ratio of the length a to the width b of the transducer is controlled between 1 and 2. The outer connecting arm 4 of the adjacent connecting arm 4 forms a second tuning space 8. The connection point 41 and the annular fixing part 3 form an outer connection point c at their center of connection position. The inner connection point 42 of the adjacent connecting arm 4 and the vibration part 2 form an inner connection point d at their center of connection position. The vertical distance between the outer connection point c and the vibration part 2 is set as e, and the vertical distance between the inner connection point d and the annular fixing part 3 is set as f. The ratio of e to f is controlled between 0.8 and 1. In addition, in this embodiment, the ratio of the length of the connecting arm 4 to the circumference of the vibration plate 1 is controlled between 0.1 and 0.5, which can improve the acoustic performance of the vibration plate, extend the bandwidth to the full frequency range of the human ear, improve the fatigue limit, and thus extend the service life.

[0033] The other structures in this embodiment are the same as those in Specific Embodiment 1, and will not be described again here. Specific Implementation Example 3 like Figure 3As shown, the difference between this embodiment and specific embodiment two is that: the edge of the annular fixing part 3 includes symmetrically distributed outer straight segments 52 and outer arc segments 62; the outer connecting end 41 of the connecting arm 4 is connected to the corresponding outer straight segment 52; the inner connecting end 42 of the connecting arm 4 is connected to the inner semi-circular arc segment 61; the outer arc segment 62, the outer straight segments 52 located at both ends of the outer arc segment 62, and the adjacent connecting arm 4 enclose a first tuning space 7; the edge of the vibrating part 2 includes symmetrically distributed inner straight segments 51 and inner semi-circular arc segments 61; the inner straight segments 51, the inner straight segments 52, and the outer straight segments 52 located at both ends of the outer arc segment 62 form a first tuning space 7. The inner semicircular arc segments 61 at both ends and the adjacent connecting arm 4 form a second tuning space 8. In this embodiment, the ratio of the length a to the width b of the transducer is controlled between 1 and 2. The outer connecting end 41 of the adjacent connecting arm 4 and the center of the connection position of the ring fixing part 3 form an outer connecting point c. The inner connecting end 42 of the adjacent connecting arm 4 and the center of the connection position of the vibration part 2 form an inner connecting point d. The vertical distance between the outer connecting point c and the vibration part 2 is set as e. The vertical distance between the inner connecting point d and the ring fixing part 3 is set as f. The ratio of e to f is controlled between 1 and 2.

[0035] The other structures in this embodiment are the same as those in Specific Embodiment Two, and will not be described again here. Specific Implementation Example 4 like Figure 4 As shown, the difference between this embodiment and specific embodiment one is that: the vibration transducer 1 is designed as a racetrack circle structure, the edges of the vibration part 2 include symmetrically distributed inner straight segments 51 and inner semi-circular arc segments 61, the edges of the annular fixing part 3 include symmetrically distributed outer straight segments 52 and outer arc segments 62, the inner semi-circular arc segments 61, the outer arc segments 62, the straight segments 52 located outside the outer arc segments 62 and the two adjacent connecting arms 4 form a U-shaped first tuning space 7, the inner straight segments 51 and the two adjacent connecting arms 4 form a second tuning space 8, and the length of the connecting arms 4 in this embodiment is shorter and the rigidity is higher than in other embodiments, which is beneficial to improving the high-frequency vibration performance of the vibration transducer 1.

[0037] The other structures in this embodiment are the same as those in Specific Embodiment 1, and will not be described again here.

[0038] The basic working principle of this invention is as follows: The vibration transducer 1 is designed as a circular or racetrack-shaped structure. The vibration transducer 1 includes a vibrating part 2 and an annular fixing part 3. The annular fixing part 3 is arranged around and spaced apart on the outer periphery of the vibrating part 2. The vibrating part 2 and the annular fixing part 3 are connected by several connecting arms 4. The number of connecting arms 4 is even, and the outer connecting end 41 of the connecting arm 4 is fixedly connected to the annular fixing part 3, and the inner connecting end 42 of the connecting arm 4 is fixedly connected to the vibrating part 2. The adjacent connecting arms 4 of this invention adopt a structure design with their ends close together, which strictly limits the movement of the vibrating part 2 and directs it towards the direction of the skull, effectively suppressing the lateral swing or irregular torsion of the vibrating part 2. The vibration of the vibrating part 2 greatly reduces energy dissipation between the fixed part and the connecting arm 4. The more stable axial movement of the vibrating part 2 also helps to achieve a more stable frequency response. The separate design of the vibrating part 2 and the fixed part is elastically connected by the connecting arm 4, which can reduce the situation where vibration is directly transmitted to the earphone shell and causes resonance and sound leakage. This effectively improves the sound leakage prevention performance of this invention. In addition, the connecting arm 4 of this invention adopts an even number design, so that the stress acting on the vibrating part 2 can be more evenly distributed to each connecting arm 4, thereby improving the structural reliability and service life of this invention. It has the effect of efficient energy transmission and effective suppression of sound leakage.

[0039] A bone conduction oscillator, comprising the aforementioned vibration transducer 1.

[0040] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A vibration transducer, having a circular or racetrack-shaped structure, characterized in that: It includes a vibrating part (2) and an annular fixing part (3). The annular fixing part (3) is arranged around and spaced apart on the outer periphery of the vibrating part (2). The vibrating part (2) and the annular fixing part (3) are connected by a number of connecting arms (4). The number of connecting arms (4) is even. The outer connecting end (41) of the connecting arm (4) is fixedly connected to the annular fixing part (3), and the inner connecting end (42) of the connecting arm (4) is fixedly connected to the vibrating part (2). The outer connecting ends (41) of at least two adjacent connecting arms (4) are close to each other and connected to the inner ring wall of the annular fixing part (3), and / or the inner connecting ends (42) of two adjacent connecting arms (4) are close to each other and connected to the edge of the vibrating part (2).

2. The vibration transducer according to claim 1, characterized in that: The vibration plate (1) is designed as a circular structure that is both centrally symmetrical and axially symmetrical. The outer connecting ends (41) of at least two adjacent connecting arms (4) are close to each other and connected to the inner ring wall of the annular fixing part (3). The inner connecting ends (42) of at least two adjacent connecting arms (4) are close to each other and connected to the edge of the vibration part (2).

3. A vibration transducer according to claim 1, characterized in that: The vibration plate (1) is designed as a runway circular structure. The edge of the vibration part (2) includes symmetrically distributed inner straight segments (51) and inner semi-circular arc segments (61). The edge of the annular fixing part (3) includes symmetrically distributed outer straight segments (52) and outer arc segments (62). The outer connecting end (41) of the connecting arm (4) is connected to the corresponding outer straight segment (52) or outer arc segment (62). The inner connecting end (42) of the connecting arm (4) is connected to the inner straight segment (51) or inner semi-circular arc segment (61).

4. A vibration transducer according to claim 3, characterized in that: The outer connecting end (41) of the connecting arm (4) is connected to the outer arc segment (62) near the center, and the inner connecting end (42) of the connecting arm (4) is connected to the inner straight segment (51) near the center.

5. A vibration transducer according to claim 3, characterized in that: The outer connecting end (41) of the connecting arm (4) is connected to the outer straight segment (52) near the center, and the inner connecting end (42) of the connecting arm (4) is connected to the inner semi-circular segment (61) near the center.

6. A vibration transducer according to claim 1, characterized in that: The outer connecting end (41) of the connecting arm (4) and the ring fixing part (3) on both sides of the connection point, and the inner connecting end (42) and the vibration part (2) on both sides of the connection point are provided with arc transition structures (9).

7. A vibration transducer according to claim 1, characterized in that: The vibration plate (1) is designed as a runway circular structure, and the ratio of the length of the connecting arm (4) to the circumference of the vibration plate (1) is controlled between 0.1 and 0.

5.

8. A vibration transducer according to claim 1, characterized in that: The width of the connecting arm (4) gradually increases from the middle towards the outer connecting end (41) and the inner connecting end (42), and the width of the connecting arm (4) is set between 0.1-0.8 mm.

9. A vibration transducer according to claim 1, characterized in that: The thickness of the vibration plate (1) is controlled between 0.1-0.3 mm.

10. A bone conduction oscillator, characterized in that: Includes the vibration transducer (1) as described in any one of claims 1-9.

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